8 Nov - 24 min - Uploaded by theRadBrad Call of Duty Modern Warfare 3 Walkthrough Part 1 with Gameplay. This is Mission 1 of the Call. Call of Duty: Modern Warfare 3 (stylized as Call of Duty: MW3) is a first-person shooter video game, developed by Infinity Ward and Sledgehammer Games, with . Sledgehammer Games, Inc. is an American video game developer, formed in by Glen Schofield and Michael Condrey. The pair formerly worked at Visceral.